Nitrate Pollution in Groundwater of the Ouazi Basin: Case of Essaouira (Southwestern Morocco)

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Output type: Chapter in book

UM6P affiliated Publication?: Yes

Author list: El Mountassir O., Bahir M., Ouazar D., Carreira P.M.

Publisher: Springer Nature

Publication year: 2021


Languages: English (EN-GB)

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Morocco is a semi-arid country with scarce and irregular precipitation; thus, surface water and groundwater resources are important for socioeconomic development. For this reason, aquifers are intensively exploited to satisfy growing agricultural, industrial and domestic needs. In addition to water scarcity, Morocco suffers from the degradation in groundwater quality, linked to the depletion of groundwater. In this paper, we zoom on the case of the Essaouira basin, where nitrate is one of the main pollutants that affect groundwater. The objective of this study is to obtain a better understanding of electrical conductivity and nitrate distributions in the aquifers during a period of 24 years. The results obtained indicate that the spatiotemporal distribution map of the electrical conductivity becomes very important from 1995 to 2018 and the NO3 concentrations ranged from 0 to 375 mg/L based on 151 groundwater samples. The distribution of high nitrate content in groundwater is consistent with the urbanization and cultural practices, where it has sewage discharge. Groundwater extraction and rapid urbanization in the central of the study area accelerate the deterioration of groundwater quality. The results of this study could provide valuable information on the state of nitrate water concentrations in the Essaouira region.


Essaouira, Groundwater, Nitrate, Pollution, Semi-arid


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Last updated on 2021-12-09 at 23:16